More datamining listed here:
https://glasscannon.ru/2017/07/starc...zhej-kampanii/
IIRC mappers were able to override portraits in the original starcraft with custom ones. Why not do the same for remastered if Blizz doesn't come through? Call it "protoss of color portraits pack" or something and make up some spiel about political correctness to advertise it.
A bigger problem with the Protoss is that they have huge chins which serve no biological or aesthetic function besides shorthand for "alien." They don't have any gills, muscles or other tissues to move like human or zerg portraits do. The dark templar cover their faces, which makes them stand out but also raises the question of why they cover their faces if their faces don't move in the first place? The SC1 models at least wiggled their faces a tiny bit considering the low res.
The only reason why various obscure sources claim the Protoss don't eat or breath, survive in space unprotected, and are photosynthetic, among other things, is because they don't have obvious mouths. However, the original manual stated that they evolved from apex predators that hunted in packs. It makes no sense that they wouldn't need to eat or breath, since even plants die in vacuum because they respire carbon dioxide and the only reason plants would evolve the means to hunt is if they were carnivorous and would thus cease being plants. The implication was always that Protoss had mouths in a different place and still needed to breath (they probably have invisible spacesuits or something, since they already have robots and teleportation).
Blizzard isn't even consistent with their space magic explanations.
SC2 gives Zeratul gratuitous nipples, which the
Artanis/Dark Templar BW model lacked, and implies female Protoss have breasts. At one point
a FAQ claimed that Zerg don't literally breathe in space, they just evolved biological spacesuits to store oxygen and don't have this adaptation unless they are expected to go into space.